Good Points
Plug and play
Easy to understand the operating guidelines
Clear and precise directions
The 3D map is excellent - choice of shortest and quickest routes (which work!) Accurate mapping, including lanes and unadopted roads.
Cash points, fuel stations and eating houses are clearly marked.

Bad Points
Minor bad point - Fuel stations are not absolutely accurate (but within the vicinity).

General CommentsThe Navman N20 is an excellent piece of kit. I no longer have to rely on my partners map reading skills (or lack of), and journeys are less fraught and quicker. I am saving many pounds in fuel costs not having to retrace my route due to 'wrong turns'. I have just purchased the additional TI kit, which I am looking forward to trying.